This paper was inspired by interest in assessing the effectiveness with which a bed of fibers, composed of fiberglass released from fractured insulation and deposited on a strainer or grid following a loss-of-coolant-accident (LOCA) in a nuclear plant, would filter and trap particulate matter of various sizes and properties. The limiting structures or random morphology of a fiber bed are analyzed, leading to estimates of the pore sizes of the passages through which the particulate suspension flows, and the likelihood of entrapment is then deduced. This multiphase flow topic appears particularly appropriate for the symposium as it exemplifies Professor Zuber’s characteristic approach of using fundamental mechanics and mathematics to derive approximate and effective models of physical reality.

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